Radiation-driven hydrodynamics of long pulse hohlraums on the National Ignition Facility

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The first hohlraum experiments on the National Ignition Facility (NIF) using the first four laser beams have activated the indirect drive experimental capabilities and tested radiation temperature limits imposed by hohlraum plasma filling. Vacuum hohlraums have been irradiated with laser powers up to 6 TW, 1 ns to 9 ns long square pulses and energies of up to 17 kJ to activate several diagnostics, to study the hohlraum radiation temperature scaling with the laser power and hohlraum size, and to make contact with hohlraum experiments performed at the NOVA and Omega laser facilities. Furthermore, for a variety of hohlraum sizes ... continued below

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Dewald, D L; Landen, O L; Suter, L J; Schein, J; Holder, J; Campbell, K et al. October 17, 2005.

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The first hohlraum experiments on the National Ignition Facility (NIF) using the first four laser beams have activated the indirect drive experimental capabilities and tested radiation temperature limits imposed by hohlraum plasma filling. Vacuum hohlraums have been irradiated with laser powers up to 6 TW, 1 ns to 9 ns long square pulses and energies of up to 17 kJ to activate several diagnostics, to study the hohlraum radiation temperature scaling with the laser power and hohlraum size, and to make contact with hohlraum experiments performed at the NOVA and Omega laser facilities. Furthermore, for a variety of hohlraum sizes and pulse lengths, the measured x-ray flux shows signatures of plasma filling that coincide with hard x-ray emission from plasma streaming out of the hohlraum. These observations agree with hydrodynamic simulations and with analytical modeling that includes hydrodynamic and coronal radiative losses. The modeling predicts radiation temperature limits on full NIF (1.8 MJ) that are significantly greater than required for ignition hohlraums.

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PDF-file: 32 pages; size: 0 Kbytes

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  • Presented at: 47th Annual Meeting of the Division of Plasma Physics, Denver, CO, United States, Oct 24 - Oct 28, 2005

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  • Report No.: UCRL-CONF-216946
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 885408
  • Archival Resource Key: ark:/67531/metadc874505

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • October 17, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 6, 2016, 6:10 p.m.

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Dewald, D L; Landen, O L; Suter, L J; Schein, J; Holder, J; Campbell, K et al. Radiation-driven hydrodynamics of long pulse hohlraums on the National Ignition Facility, article, October 17, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc874505/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.